Method of making drawing-knives.



170,847,137. PATENTED MAR, 12, 1907.

W. s. WARD. 4 METHOD OF MAKING DRAWING KNIVES.

APPLICATION FILED MAB..24,1906

UNITED STATES PATENT OFFTGE.

WILLIAM S. WARD, OF PLANTSVILLE, CONNECTICUT, ASSIGNOR TO H. D.

SMITH AND COMPANY, OF PLANTSVILLE, CONNECTICUT, A CORPORA- TION.

Specification of Letters Patent.

Patented March 12, 1907'.

App cation filed March 24, 1906. Serial No. 307,834.

Io all whom it may concern:

Be it known that I, WILLIAM S. WARD, a citizen of the United States,residing at Plantsville, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMethods of Making Drawing-Knives, of which the following is aspecification.

My invention has relation to drawingknives formed by drop-forging, andin such connection relates to the method of forming the blade, shanks,and portions of the handles at a single forging.

The objects of my improvement are economy, uniformity, and neatness inproduction, and particularly the economical production of the articlewith a particular style of handle.

In the accompanying drawing, Figure 1 is a view of the broad side of ablank which is the result of the first step in my method of makingdrawing-knives. Fig. 2 is an edge view of the samethe lower edge-asshown in Fig. 1. Fig. 3 is a transverse section of the same on the line00 as of Fig. 1. Fig. 4 is a broad-side view of the same when partiallytrimmed, and Fig. 5 is a broad-side view of the completed forging.

The drawing-knife blade A and the shanks 6 6, extending longitudinallyfrom the said blade, are or may be of the ordinary form. The shank andhandle connections 7 7 are of a rounded form in cross-section and inside view are on a curve, so as to project substantially at a rightangle to the length of the blade. Each handle connection merges into atapering handle-tip 8, from which tip there extends a flattenedhandleweb 10,with a handle-butt 11 at its extreme outer end, all asshown in Fig. 5. The handles are to be finished by the application of asuitable handle-scale to each broad side of the handle-web, allsubstantially as disclosed in my Patent No. 737,179.

' In order to produce this drawing-knife, as shown in Fig. 5, I formdies with recesses for the respective parts hereinbefore described; butinstead of locating the said parts, as shown in Fig. 5, they are locatedwith the recesses for the handle portions lying closely to andsubstantially parallel with the bladerecess and with the connectingshank-recess curved at each end, whereby a rectangular or round bar ofsteel B when properly heated and subjected to the dies will produce theblank shown in Figs. 1, 2, and 3, with the usual web or fin of metal 9projecting from the several parts and connecting them with the bar ofmetal B, from which they were formed. This web or fin is then removed bymeans of trimming-dies and the forging straightened out into the formshown in Fig. 5. It is best to do the trimming at two diii'erentoperations, in which case the outer edges will be trimmed off first,changing the blank, Figs. 1, 2, and. 3, into the form shown in Fig. 4-.The remaining or inner web may then be removed by the second trimmingoperation. The forging thus produced is substantially doubled uponitself at each end, and after trimming and while still hot it isstraightened at the shank portions to bring the handle portions into theproper position, as shown in Fig. 5. In this connection it' 'should benoted that the proper curve for the handle connections 7 is best giventhem in the die-recesses, so that this curve is not changed in thestraightening-out process, all of the change being produced by bendingand straightening out the shanks 6. This is easily accomplished by theaid of a former shaped to conform to the back edge of the shanks, (shownin Fig. 4,) against which former the back edge of the shanks willgradually come in contact as the forging is straightened out. By mymethod this particular style of handle is cheaply and neatly forged. inone piece with the blade and shanks.

I claim as my invention The herein-described method of producingdrawing-knives which consists in striking up a blank from a bar of metalby dr0p-forging in dies, with the blade, shanks and handle portionssubstantially doubled upon each other at each shank, then trimming offthe fin or web, and finally straightening the shank portions to bringthe handle portions into their proper position relatively to the blade.

WILLIAM S. WARD. Witnesses:

JAMns SHEPARD. SHEFFIELD H. CLARKE.

